Hi Alex, This patch passes testing with the 0x270c device, and (when I comment out its known_bogus_vf_intx_pin entry) the warning is triggered by QEMU.
Thanks, Gage > -----Original Message----- > From: Alex Williamson [mailto:[email protected]] > Sent: Thursday, September 20, 2018 3:03 PM > To: [email protected]; Raj, Ashok <[email protected]>; Eads, Gage > <[email protected]> > Cc: [email protected]; [email protected] > Subject: [PATCH v2] vfio/pci: Mask buggy SR-IOV VF INTx support > > The SR-IOV spec requires that VFs must report zero for the INTx pin register > as > VFs are precluded from INTx support. It's much easier for the host kernel to > understand whether a device is a VF and therefore whether a non-zero pin > register value is bogus than it is to do the same in userspace. Override the > INTx > count for such devices and virtualize the pin register to provide a > consistent view > of the device to the user. > > As this is clearly a spec violation, warn about it to support hardware > validation, > but also provide a known whitelist as it doesn't do much good to continue > complaining if the hardware vendor doesn't plan to fix it. > > Known devices with this issue: 8086:270c > > Signed-off-by: Alex Williamson <[email protected]> Tested-by: Gage Eads <[email protected]>
